Income Tax Expense - Components Of Income From Continuing Operations Before Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Income Tax Expense
United States	$ 100,059	$ 98,983	$ 90,674
Foreign	29,830	19,964	15,761
Earnings before income tax	$ 129,889	$ 118,947	$ 106,435